problem with unique key validation with action Listener in modelpanel

[mvreddy.madhu]

hi,
     I have a problem regarding unique key validation with actionListener in model panel.

here is my code:


<s:decorate id="countryCodeField" template="../layout/edit.xhtml">
                 <ui:define name="label">Country_code</ui:define>
<h:inputText id="countryCode" size="20" required="true"
                      value="#{country.countryCode}">
       <a4j:support id="countryCodeCheck" event="onblur"                reRender="countryCodeField" ajaxSingle="true"                      actionListener="#{countryS.verifyCarrierCodeAvailable}"/>
         </h:inputText>
  </s:decorate>
          
                          
        <s:decorate id="name" template="../layout/edit.xhtml">
            <ui:define name="label">Name</ui:define>
            <h:inputText value="#{country.name}"/>
        </s:decorate>



session bean:



package com.infyz.toms.master.hg.session;


import java.util.List;
import java.sql.Date;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;
import com.infyz.toms.entity.*;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.Factory;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.*;
import org.jboss.seam.annotations.Observer;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.datamodel.DataModel;
import org.jboss.seam.annotations.datamodel.DataModelSelection;
import org.jboss.seam.annotations.Logger;
import org.jboss.seam.faces.FacesMessages;
import org.jboss.seam.log.Log;

@Stateful
@Name("countryS")
@Scope(ScopeType.SESSION)
public class CountrySSAction implements  CountrySS  {
     
     @In
     private FacesMessages facesMessages;
     
     @PersistenceContext(type=PersistenceContextType.EXTENDED)
     private EntityManager em;
     
     @In(required=false, create=true)
     @Out(required=false)
     private Region region;
     
     @Logger
     private Log log;
     
    // private int param;
    
     @DataModel
     private List<Country> countries;
    
     @DataModelSelection
     @Out(value="country", required=false)
     @In(value="country", required=false)
     private Country selectedCountry;
   
    
     public void find(){
          getCountries();
     }
    
     @Factory
     @Observer("countryConfirmed")
     @SuppressWarnings("unchecked")
     @Begin
     public void getCountries()
     {
          String qry = "select country from Country country";
          countries = em.createQuery(qry).getResultList();
     }
    
     public void selectCountry() {
          selectedCountry = em.find(Country.class,  selectedCountry.getCountryId());
          selectedCountry.getRegion();
         
         
      }

     public Country getSelectedCountry()
     {
       return selectedCountry;
     }
    
     public String addCountry() {
          selectedCountry = new Country();
          return "sucess";
     }

    @End
     public String persist() {
          selectedCountry.setCreatedDate(getCurrentDate());
           selectedCountry.setModifiedDate(getCurrentDate());
           em.persist(selectedCountry);
          log.info(":Rao:------------persisted");
     return "/hg/CountryS.xhtml";
     }
    @End
     public String remove(){
          selectedCountry = em.find(Country.class,  selectedCountry.getCountryId());
          if(selectedCountry!=null)
          em.remove(selectedCountry);
               return "/hg/CountryS.xhtml";
          }
    @End
          public String update(){
             selectedCountry = em.find(Country.class, selectedCountry.getCountryId());
               if(selectedCountry!=null){
                  selectedCountry.setCreatedDate(getCurrentDate());
                 selectedCountry.setModifiedDate(getCurrentDate());
               em.merge(selectedCountry);
             log.info("------------updated");
               }
            
               return "/hg/CountryS.xhtml";
          }
         
          public  void selectRegion(){
              if (region != null)
              {
                 region = em.find(Region.class, region.getRegionId());
              selectedCountry.setRegion(region);
              }
          }  
     

        @Destroy @Remove
     public void destroy() {}
     public Date getCurrentDate()
        {
           return new java.sql.Date( System.currentTimeMillis() );
        }
     @End
     public String verifyCarrierCodeAvailable() {
         if (getSelectedCountry().getCountryCode() != null &&
             !isActTypeCodeAvailable(getSelectedCountry().getCountryCode())) {
             facesMessages.addToControl("countryCode", " #{country.countryCode} #{messages['toms.application.messages.duplicatekey']}");
         }
         return "/hg/CountryS.xhtml";
     }
          
          /**
            * used to retrieve the data from the database
            */
     public boolean isActTypeCodeAvailable(String countryCode) {
          System.out.println("company code"+countryCode);
         return em.createQuery("from Country as country where country.countryCode = :countryCode")
                              .setParameter("countryCode", countryCode)
                              .getResultList().size()==0;
       
     }
    
     }





the main problem here i faced is when i edit the countryCode and changed,at back end the value is updating in the database when i pressed the next tab.The update statement is executing in the server.

can any one help me i strucked with these code for last ten days.

Thanks & Regards